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Document Title |
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7543392 |
Motion estimation method and system for mobile body
A motion estimation method and system for a mobile body are provided. The method includes: obtaining magnetic field information from compass information of the mobile body; comparing the magnetic...
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7412775 |
Gyroscope north seeker system and method
A sensor system and method for determining a relative direction to true north is provided. The system comprises at least one angular rate sensor, such as a MEMS sensor, which has an input axis and...
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7337549 |
Input device for using geomagnetic sensor and a method thereof for generating input signal
An input device using a geomagnetic sensor includes a geomagnetic sensor outputting a voltage corresponding to geomagnetism, and a control part calculating an azimuth using the voltage output from...
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7248983 |
Electronic compass and method of controlling an electronic compass using independent calibration and compass heading modules
A method for controlling an electronic compass includes receiving raw magnetic field data into a calibration module and determining a calibration output based upon the raw magnetic field data. The...
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7086164 |
Method and device for measuring directional, and computer program
A method for measuring a directional of a body in a three-dimensional space defined by an X-axis (magnetic north), a Y-axis, and a Z-axis is proposed. A geomagnetic force along an x-axis, which is...
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6915584 |
Compass with electromagnetic half-shell transformer energy transmission and optoelectronic data signal transmission
The invention concerns a compass having an electro magnetic half-shell transformer energy transmission and opto electronic data transmission. To avoid a slipring connection during the transfer of...
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6842991 |
Gyro aided magnetic compass
An improved method, system, and device for a compass combining an electronic magnetic compass and an angular velocity sensing gyroscope. One aspect of the invention integrates an angular velocity...
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6425187 |
Gyro-sensor
A locating device for vehicles with a carrier to be mounted in the vehicle in which a gyro-sensor is located to detect the movement of moving components for the purpose of determining the location....
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5771596 |
Container for liquids including a level control and a gyro compass
A first liquid container has therein a level control including a float valve, a storage tank or second container and a third container having therein a liquid which is maintained at a fixed liquid...
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5408751 |
High resolution gyro system for precise angular measurement
The system includes for planar angular measurements a gyro--preferably a laser gyro--and an angle encoder mounted with their sensitive axes coaxially on a turntable shaft, which is rotatably...
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5349757 |
Tape-suspended meridian gyro
A tape-suspended meridian gyro has an outer housing, an intermediate housing movably mounted in the outer housing and a gyro having substantially horizontal spin axis. The gyro is suspended by...
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4977679 |
Azimuth signal generator
In an azimuth signal generator for an automobile navigation system a change in the rotational rate of an inertia rotary member, which has its rotary shaft held vertically and is driven at...
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4811233 |
Cost-optimal state feedback controller for all-attitude gimbal system
An improved cost-optimal state feedback control system for stabilizing the nertial reference platform in all-attitude inertial guidance systems which uses the "region" control concept. It reduces...
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4709486 |
Method of determining the orientation of a surveying instrument in a borehole
A method of determining the orientation of a surveying instrument in a borehole from measurements of the earth's gravitational and magnetic fields wherein the azimuth angle is calculated directly...
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4603483 |
Thermal gradient compensator for fluid rotor gyroscopic apparatus
A fluid sphere gyroscope is used as the north-seeking sensing element in a gyrocompass. A sensor responsive to angular deviation of the gyroscope from the horizontal provides a tilt signal which is...
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4599803 |
Heading indicator and method of using
A heading indicator is disclosed which utilizes a one degree of freedom platform stabilized by a two degree of freedom dry flexure gyro. The output of one of the sensitive axis is coupled through...
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4379365 |
Gyrocompass
A gyrocompass including a first gimbal, a gyro motor mounted in the first gimbal and including a gyro rotor mounted to rotate about a horizontally alignable spin axis, a pendulous body in which the...
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4224573 |
Electric circuit device and pendulum unit incorporating such devices
An electrical circuit device comprises an integrating amplifier arrangement that provides a circuit output signal in response to an input signal from a differential amplifier. The differential...
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3691643 |
GYROMAGNETIC COMPASS SYSTEM
A gyromagnetic compass system for navigable craft which utilizes solid state electronic circuits to provide a heading output including only the desired long term components of magnetic heading and...
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3253342 |
Compensated compass system
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3228628 |
Method and apparatus for magnetically orienting a space vehicle
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3037289 |
Directional reference correction system
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2914863 |
Gyroscopically stabilized compass system
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2887873 |
Method of measuring and compensating for deviation errors in earth's field sensitivedirection indicators
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